#include<iostream>
#include<algorithm>
using namespace std;
#include<vector>
int main() {
	vector<int>v;
	v.push_back(1);
	v.push_back(3);
	cout << v[0] << " " << v[1] << endl;
	swap(v[0], v[1]);
	cout << v[0]<< " " << v[1] << endl;
	vector<int>v1(10, 1);
	for (int i = 0; i < v1.size(); i++) {
		cout << v1[i] << endl;
	}
	cout<<v1.size()<<endl;
}